Systematik 
315 
CLARKE, A., The genus Tricholoma (Naturalist 1912, 364—365). 
This paper is a summary of a lecture delivered at the Mycological 
foray of the Yorkshire Naturalists’ Union at Sandsend. The general 
characters of the genus are described rather fully. A few remarks are 
made concerning the habitat, season, and edibility some of. the species. 
Of the 137 species of Tricholoma recorded as occuring in the British 
Isles 68 have been met with in Yorkshire. J. Ramsbottom (London). 
HAWLEY, h. C., The Pyrenomycetes and some problems they 
suggest (Naturalist 1912, 341—343). 
This is the author’s abstract of a lecture delivered at the meeting of 
the Mycological section of the Yorkshire Naturalists’ Union at Sandsend. 
What we are to understand by the term Pyrenomycetes is first considered. 
The presence or absence of a stroma, the colour and septation of the 
spores, and the sexual and cytological features of the group are shortly 
dealt with from the point of view of value in classification. 
J. Ramsbottom (London). 
GROVE, w. B., Mycological Notes. II (Journ. Bot. 1913, 51, 42—46). 
The author describes some observations on the occurrence of Pucci- 
nia Caricis. He holds that the chief means of distribution of the spores 
of the Uredineae is the wind but the efficiency of this agent can be 
reduced to very narrow limits by other factors. There are also some 
remarks on Phoma pigmentivora, Uromyces Loti , Hemileia Phaji and 
Puccinia Zopfii. To these are added descriptions of three fungi newly 
recorded for this country. J. Ramsbottom (London). 
TRINCHIERT, G., Intorno alia forma ascofora dell’ oidio della 
quercia (Bull. Soc. Bot. Ital. 1912, Nr. 4, 100—102). 
L’auteur observe que la constatation faite par Arnaud et Foex de 
perithèces de Microsphaera quercina sur les feuilles de chêne à Cavillar- 
gues (France) n’est pas une preuve suffisante pour identifier la forme 
d’Oidium qui a envahi les chênes d’Europe avec l’érysiphée américaine. 
Pour cela il faudrait comparer les deux formes d ’Oidium (européenne et 
américaine) et faire aussi des recherches expérimentales. M. Turconi. 
HEDGCOCK, G. G., The Cr onartium associated with Perider- 
mium filamentosum Peck. (Phytopath. 1912, 2, 176—177). 
Auf Castillefa } die mit Peridermium filamentosum Peck, infiziert 
wurde, trat ein Cr onartium auf, das Verf. Cr onartium filamentosum 
(Peck.) comb. nov. nennt. Yerf. hatte schon früher die Vermutung aus¬ 
gesprochen, daß ein Cronartium auf Castilleja mit Peridermium füa- 
mentosum Zusammenhängen müsse. Riehm (Berlin-Dahlem). 
TROTTER, a., Mycetum tripolitanorum pugillus (Ann. Mycol. 1912, 
10, 509—514). 
Eine Aufzählung der vom Verf. in Tripolis während der Monate 
Februar—April gesammelten Pilze. Allerdings konnte bis jetzt nur die 
Gegend der Hauptstadt Tripolis und diejenige von Horns berücksichtigt 
werden. Die Aufzählung enthält unter 36 Arten eine Anzahl neue Species, 
besonders Uredinee?z und Fungi imperfecti. Neger. 
